Kinect Produced Autostereograms (Magic Eye Pictures)

April 1, 2011 by Mike Szczys 8 Comments

[Kyle McDonald], working collaboratively with [Golan Levin] at the Studio for Creative Inquiry, has come up with an application that can produce autostereograms. These are pictures that appear to be three-dimensional thanks to a visual illusion created by forcing your eyes to adjust focus and vergence differently than they normally would. The program is called ofxAutostereogram and it comes with a couple of examples. Both are show in [Kyle’s] video (embedded after the break), starting with a depth image of a shark. This combines with a texture tile, then is processed through the openFrameworks software in the package to produce the final image.

If that’s all it did you might find it rather unimpressive… these images have been around for some time although they were never so easy to produce on your home computer. But the second example is a pretty fantastic one. You can use a depth image from a Kinect as the starting point. As seen above, there is a preview window where you can adjust the clipping planes in order to include the correct depth. This also allows you a preview of your pose. Once it’s just right, snap a pick and process it through the software.

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Transmitting Power And Data Through Thick Metal Enclosures

April 1, 2011 by Mike Szczys 49 Comments

So let’s say you have a submarine, or a nuclear containment chamber which has walls made of thick metal. Now let’s say you want to transmit power or data through this wall. Obviously you’re not going to want to drill a hole since this wall is either keeping seawater out, or potential contamination in, but wireless signals aren’t going to travel well through dense metal. [Tristan Lawry’s] entry in the Lamelson-MIT Rensselaer Student Prize seeks to address this issue by using ultrasound waves to transmit data and power.

In the video after the break [Tristan] speaks briefly about his project, then demonstrates the transmission of power and digital audio simultaneously through a two-inch thick steel plate. This is accomplished with a set of piezo transducers attached to both the inside and outside of the plate. Communications originate by feeding electricity to one transducer, which sends ultrasonic vibrations through the material to be received by its counterpart on the other side. It’s easy for us to understand data transmission conducted in this manner, after all that’s how the knock block receives information. What we don’t understand is how it can “transfer large amounts of electrical power”. If you can explain it in layman’s terms please do so in the comments.

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Think Geeks Wants You To Have Broken Stuff

March 31, 2011 by Mike Szczys 13 Comments

Think Geek has a growing pile of returns and damaged product that they’re trying to get rid of. The purveyors of technological oddities, like any other large retailer, sometimes have stuff that doesn’t work right, or has been damaged somewhere between factory and consumer. The broken bits find their way back to the distribution center and now they’re stuck with the task of doing something with it.

They can’t sell it, and we’re happy to say they don’t want to throw it out. So they’re considering giving it away to worth-while causes like Hackerspaces and schools. Looks like no real details have been hammered out as of yet. But if you belong to a Hackerspace or other group that can find a use for this stuff, click-through the link above and sign up to let them know you’re interested. The goldmine of reusable stuff is located in Columbus, Ohio and pick-ups might be available. Otherwise they’re going to need to find a way to cover the cost to ship boxes to those interested.

Don’t forget to document your projects and let us know what you use this stuff for.

[Thanks RenderMan]

Building An Advanced Mobile Phone Service (AMPS) Base Station

March 31, 2011 by Mike Szczys 8 Comments

Remember the early days of cellphones and carphones when they were super-bulky and all the rage? Those early handsets used analog technology for communications in a protocol called Advanced Mobile Phone Service (AMPS). As more customers flocked to wireless providers, networks were transitioned over to digital phones in order to save bandwidth. Some places still support AMPS but it has rapidly gone the way of the Dodo. But a few years back [Mark Atherton] got his hands on some old hardware, including a bag-phone and some test equipment, and set out to build a base station that can control AMPS handsets. In short, he’s creating his own analog cellphone tower. There’s a wealth of information on his page. The writeup comes out as a mix of protocol and electronic resources he scavenged across the net, as well as a work log serving as a testament to his successes and failures. He did his experiments in New Zealand, so if you’re thinking of undertaking this make sure to research your local radio regulations first.

[Thanks J]

PCBs Without Any Substrate

March 31, 2011 by Mike Szczys 52 Comments

[Kimio Kosaka] is taking the concept of free-formed circuits to the next level with O’Baka Project No.7. It’s a fully functioning Arduino board, without the board. The traces are there and provide all of the support for the rest of the hardware. You can imagine the fragility of the package so it won’t be a surprise to learn that O’Baka Project means ‘stupid’ project.

We don’t think this manufacturing process is completely worthless. The ‘board’ seen above looks quite interesting and might be a good idea when building a show-piece where you want the circuitry to be seen. [Kimio] describes the process he used to achieve this look. The first step is to design a single-sided circuit board; he used EagleCAD. After printing out the traces he used 0.46mm steel wire to trace out each connection. Now heat up that soldering iron – [Kimio] recommends using high-acid flux to ease the process of soldering to the steel.

We think this would nicely compliment projects like LED cubes that use the circuit itself as a support structure. See this Arduino alternative from several different angles in the video after the break.

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[Jason Scott] Gets A Job In A Candy Factory — Kinda

March 31, 2011 by Mike Szczys 11 Comments

Remember when you used to have to dial into a Bulletin Board System to connect with others through computers? How about those fond memories of phone phreaking? If you find that the details are fading in your mind you’ll be happy to know that [Jason Scott] is making sure they’ll never be forgotten. And now he’s landed a new job that will make this mission even easier.

We’re most familiar with [Jason’s] film, BBS: The Documentary. This five-hour epic traverses the oft-forgotten world of the BBS. It pays attention to things like the formation of ASCII art groups, the elite control of the Sysop before the Internet decentralized access to information, and quirky technological limitations like what happened as FIDOnet ran out of addresses for new nodes.

In short, [Jason Scott] is a technological historian. He gives speeches, makes movies, and finds information stashes that history shouldn’t forget. He’s done this outside the tradition of finding a Professorship or Curator position for a major institution. Instead he asked for sabbatical funding through Kickstart, and now he’s found his way to a position that seems like it’s made just for him; Archivist for the Internet Archive. Go get ’em [Jason].

Using TouchOSC With Your Projects

March 31, 2011 by Mike Szczys 5 Comments

[Marcus] wrote a guide to using TouchOSC to control your projects. He sent a link to us after reading our feature about using Open Sound Control for Arduino without an Ethernet shield. He’s been using that method for quite some time now, but takes it one step further by using a smartphone as a control device. He designs his own user interface for the iPhone using TouchOSC. This is a package which we’ve seen in other projects but now you can get an idea of how easy it really is.

The project starts by interfacing an Arduino with the device you’d like to control. The circuit above patches into a remote control using a couple of transistors. Now the Arduino can simulate button presses on that remote, sending the signal to turn a light on or off. Next, TouchOSC is used for the smartphone – here it’s an iPhone but the suite works on Android as well. In the video after the break you can watch a quick interface design demo. Buttons are dragged into existence, uploaded to the phone, then configured to control you device over a network. A Processing sketch listens for OSC commands and then sends instructions to the Arduino via USB.

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